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/*
* Copyright (C) 2009 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.renderscript;
import java.lang.Math;
import android.util.Log;
public class ProgramVertexAlloc {
public static final int MODELVIEW_OFFSET = 0;
public static final int PROJECTION_OFFSET = 16;
public static final int TEXTURE_OFFSET = 32;
Matrix mModel;
Matrix mProjection;
Matrix mTexture;
public RenderScript.Allocation mAlloc;
public ProgramVertexAlloc(RenderScript rs) {
mModel = new Matrix();
mProjection = new Matrix();
mTexture = new Matrix();
mAlloc = rs.allocationCreatePredefSized(
RenderScript.ElementPredefined.USER_FLOAT,
48);
mAlloc.subData1D(MODELVIEW_OFFSET, 16, mModel.mMat);
mAlloc.subData1D(PROJECTION_OFFSET, 16, mProjection.mMat);
mAlloc.subData1D(TEXTURE_OFFSET, 16, mTexture.mMat);
}
public void loadModelview(Matrix m) {
mModel = m;
mAlloc.subData1D(MODELVIEW_OFFSET, 16, m.mMat);
}
public void loadProjection(Matrix m) {
mProjection = m;
mAlloc.subData1D(PROJECTION_OFFSET, 16, m.mMat);
}
public void loadTexture(Matrix m) {
mTexture = m;
mAlloc.subData1D(TEXTURE_OFFSET, 16, m.mMat);
}
public void setupOrthoWindow(int w, int h) {
mProjection.loadOrtho(0,w, h,0, -1,1);
mAlloc.subData1D(PROJECTION_OFFSET, 16, mProjection.mMat);
}
public void setupOrthoNormalized(int w, int h) {
// range -1,1 in the narrow axis.
if(w > h) {
float aspect = ((float)w) / h;
mProjection.loadOrtho(-aspect,aspect, -1,1, -1,1);
} else {
float aspect = ((float)h) / w;
mProjection.loadOrtho(-1,1, -aspect,aspect, -1,1);
}
mAlloc.subData1D(PROJECTION_OFFSET, 16, mProjection.mMat);
}
public void setupProjectionNormalized(int w, int h) {
// range -1,1 in the narrow axis at z = 0.
Matrix m1 = new Matrix();
Matrix m2 = new Matrix();
if(w > h) {
float aspect = ((float)w) / h;
m1.loadFrustum(-aspect,aspect, -1,1, 1,100);
} else {
float aspect = ((float)h) / w;
m1.loadFrustum(-1,1, -aspect,aspect, 1,100);
}
m2.loadRotate(180, 0, 1, 0);
m1.loadMultiply(m1, m2);
m2.loadScale(-2, 2, 1);
m1.loadMultiply(m1, m2);
m2.loadTranslate(0, 0, 2);
m1.loadMultiply(m1, m2);
mProjection = m1;
mAlloc.subData1D(PROJECTION_OFFSET, 16, mProjection.mMat);
}
}
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